Initial pass at prometheus support. (#56)

1 files changed, 42 insertions, 0 deletions

diff --git a/server/metrics/metrics.go b/server/metrics/metrics.go
new file mode 100644
index 0000000..4102353
--- /dev/null
+++ b/server/metrics/metrics.go
@@ -0,0 +1,42 @@
+package metrics
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+// Metrics collects the metrics.
+type Metrics struct {
+	AuthValid,
+	AuthExchange,
+	Errs *prometheus.CounterVec
+}
+
+// M structure to collect all metrics together.
+var M Metrics
+
+// Register metrics and metrics page.
+func Register() {
+	M = Metrics{
+		AuthValid: prometheus.NewCounterVec(prometheus.CounterOpts{
+			Namespace: "cashier",
+			Subsystem: "auth",
+			Name:      "valid_total",
+			Help:      "Auth Valid calls",
+		}, []string{"module"}),
+		AuthExchange: prometheus.NewCounterVec(prometheus.CounterOpts{
+			Namespace: "cashier",
+			Subsystem: "auth",
+			Name:      "exchange_total",
+			Help:      "Auth Exchange calls",
+		}, []string{"module"}),
+		Errs: prometheus.NewCounterVec(prometheus.CounterOpts{
+			Namespace: "cashier",
+			Subsystem: "sys",
+			Name:      "error_total",
+			Help:      "Error counts by module",
+		}, []string{"module"}),
+	}
+	prometheus.MustRegister(M.Errs)
+	prometheus.MustRegister(M.AuthValid)
+	prometheus.MustRegister(M.AuthExchange)
+}